Deletion of indices

Elastic Stack Elasticsearch
1

Getting FS utilization alert from elasticsearch node .On further checking I found some old indices
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/2/index/_bs.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/2/index/_68.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/2/index/_gu.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/1/index/_5o.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/1/index/_gb.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/1/index/_ap.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/3/index/_6i.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/3/index/_g0.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/3/index/_b9.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/4/index/_bt.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/4/index/_6h.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/4/index/_ga.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/0/index/_gv.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/0/index/_bs.fdt
/u01/app/elkprd/elasticsearch/var/lib/elasticsearch/nodes/0/indices/_0IJAYgVTh2N1tHfmaxclQ/0/index/_72.fdt

Can these indices be archived to free up the spaces?

2

Do not ever alter or delete anything from the Elasticsearch data path - ALWAYS use the Elasticsearch APIs to delete or modify indices. If you want to backup data before deleting it from the cluster, use the snapshot API.

3

can you guide me through ? Because I am new to ELK . Should I use Kibana API for taking snapshot?
After deletion of the indices , the disk space in the server would be free up ?